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Renesas ISL91211AIKZ-T
- Part No.:
- ISL91211AIKZ-T
- Manufacturer:
- Renesas
- Package:
- 35-BGA
- Datasheet:
-
ISL91211AIKZ-T.pdf
- Description:
- IC REG BUCK PROG TRPL 35BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL91211AIKZ-T from Renesas is a triple-output, 4-phase programmable Power Management IC (PMIC) with integrated synchronous buck controllers, delivering up to 5A per phase continuous current. It supports 2+1+1 phase configuration (VOUT1 = 10A, VOUT2/VOUT3 = 5A each), operates from 2.5V–5.5V input, features ±0.7% system output accuracy with remote sensing, and enables dynamic voltage scaling for AI processors and high-end smartphones.
For engineers reviewing the ISL91211AIKZ-T datasheet, ISL91211AIKZ-T pinout, ISL91211AIKZ-T application, or ISL91211AIKZ-T equivalent, this PMIC is selected for compact, high-efficiency multi-rail power delivery in space-constrained mobile and edge AI platforms where fast transient response (50A/µs per phase), I²C/SPI configurability, and robust fault protection are required.
Technical Context
The ISL91211AIKZ-T implements Renesas' proprietary R5 control architecture, enabling ultra-fast load transient response without external compensation while maintaining seamless DCM/CCM transitions. Its four independent buck controllers support flexible reconfiguration-two phases assigned to VOUT1 (10A total), one each to VOUT2 and VOUT3 (5A each)-with programmable PWM frequency (2–6 MHz) and automatic diode emulation at light loads.
All power stages integrate low-RDS(ON) MOSFETs (HS: 23 mΩ, LS: 9 mΩ), supporting small external inductors (e.g., 220 nH) and capacitors. Remote voltage sensing on all three outputs ensures tight regulation under PCB IR drop, and the 54-ball WLCSP package (2.551 mm × 3.670 mm, 0.4 mm pitch) enables minimal solution footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Triple output: 2+1+1 phase (VOUT1 = 10A, VOUT2 = 5A, VOUT3 = 5A) |
| Input Voltage Range | 2.5V–5.5V AVIN/PVIN - supports single-cell Li-ion and USB PD input rails |
| Output Voltage Range | 0.3V–2.0V per rail (I²C-programmable in 1.2–2.0 mV steps) |
| Switching Frequency | 2MHz–6MHz - enables use of sub-300 nH inductors and reduces EMI filtering burden |
| System Accuracy | ±0.7% over –40°C to +85°C with remote sensing - eliminates need for board-level calibration |
| Light-Load Efficiency | Diode emulation + pulse skipping - extends battery runtime in standby/sleep modes |
| Protection Features | UV/OV/OC/OT detection with latch-off or hiccup mode - prevents damage during fault conditions |
Pinout & Package
Package: 54-ball WLCSP (2.551 mm × 3.670 mm, 0.4 mm pitch), RoHS-compliant, MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN_A, PVIN_B, PVIN_C, PVIN_D | Power stage input supplies | Independent input rails per phase - allows optimized layout and thermal separation |
| PH_A, PH_B, PH_C, PH_D | Buck switching nodes | Direct connection to external inductors; PH_A/B/C/D map to VOUT3/VOUT2/VOUT1/VOUT1 respectively in 2+1+1 config |
| VOUT1, VOUT2, VOUT3 | Output voltage sense inputs | Remote feedback points - placed at load to compensate for PCB trace resistance |
| RTN1, RTN2, RTN3 | Remote ground sense inputs | Paired with VOUTx to close high-accuracy feedback loop at point-of-load |
| EN | Master enable input | NMOS logic threshold - compatible with 1.8V GPIO; controls startup sequencing |
| MPIO0–MPIO3, GPIO0–GPIO2 | Multipurpose I/O pins | Configurable as I²C/SPI, PGOOD, DVS, or hardware enable - reduces external logic count |
Key Features
| Feature | Design Value |
|---|---|
| R5 Control Architecture | Zero external compensation required; achieves <10 µs transient recovery with 50A/µs slew rate |
| Dynamic Voltage Scaling (DVS) | Per-rail programmable slew rate (3 mV/µs); supports real-time core voltage adaptation for AI SoCs |
| Integrated Power Stages | 23 mΩ HS / 9 mΩ LS MOSFETs - enables >94.7% peak efficiency at 3.8VIN/1.8VOUT |
| I²C/SPI Dual Interface | 3.4 MHz I²C / 26 MHz SPI - supports both high-speed programming and low-pin-count system integration |
| Flexible Phase Reconfiguration | Hardware-selectable 2+1+1 (ISL91211A) or 1+1+1+1 (ISL91211B) - same die, different pin strapping |
Applications
| Smartphone Application | AI Edge Processor Power |
|---|---|
|
Use Scenario: Multi-core application processor (e.g., Qualcomm Snapdragon) requiring independent, dynamically scaled rails for CPU, GPU, and NPU subsystems. IC Role / Device Role / Timing Role: Primary PMIC delivering three regulated outputs with synchronized sequencing and real-time DVS commands via I²C. Use Value: Enables 10A peak current to CPU core while maintaining ±0.7% regulation across temperature - critical for sustained performance without thermal throttling. |
Use Scenario: Low-latency inference accelerator (e.g., Google Edge TPU) demanding rapid voltage transitions between inference and idle states. IC Role / Device Role / Timing Role: Triple-rail power controller executing sub-10 µs DVS transitions with coordinated soft-start and fault monitoring. Use Value: 3 mV/µs DVS slew rate and 50A/µs transient capability reduce voltage undershoot during wake-up, preventing timing violations in high-frequency AI cores. |
| Optical Transceiver Module | AR/VR Glasses Power System |
|
Use Scenario: 100G/400G optical module with DSP, laser driver, and TIAs requiring tightly regulated, low-noise analog and digital supplies. IC Role / Device Role / Timing Role: Compact PMIC supplying 1.0V (DSP), 1.8V (laser bias), and 3.3V (TIA) rails from single 3.3V input using external LDO post-regulation. Use Value: 2.55 mm × 3.67 mm WLCSP footprint fits within dense optical module PCB area; remote sensing compensates for milliohm-level trace losses. |
Use Scenario: Binocular AR headset with dual display drivers, IMU, and vision processors operating from constrained battery capacity. IC Role / Device Role / Timing Role: Centralized power manager delivering three independent rails with ultra-low quiescent current (<1 µA in shutdown) and programmable power-on sequencing. Use Value: Diode emulation mode achieves >85% efficiency at 10 mA load - extending usable battery life during low-power sensor fusion operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91211BIKZ-T | Quad-output (1+1+1+1) configuration; identical pinout and package but VOUT4 enabled and RTN4 functional | Required when fourth independent rail (e.g., memory I/O or camera ISP) is needed | Select ISL91211BIKZ-T only if quad-rail operation is mandatory; ISL91211AIKZ-T saves cost and simplifies layout for triple-rail systems |
| ISL91301AIKZ-T | 42-ball WLCSP, lower per-phase current (4A), 2+1+1 config; lacks MPIO3 and one GPIO | Suitable for mid-tier mobile SoCs with reduced power budgets and simpler interface requirements | Choose ISL91301AIKZ-T for cost-sensitive designs where 4A/rail and 3.4 MHz I²C suffice; not drop-in due to smaller package and pin count |
Compared with ISL91211BIKZ-T, the ISL91211AIKZ-T provides higher per-rail current (10A vs. 5A on VOUT1) and eliminates unused VOUT4/RTN4 routing; compared with ISL91301AIKZ-T, it delivers 25% higher phase current, faster interfaces, and enhanced transient response - making it optimal for flagship AI and mobile platforms.
Availability
ISL91211AIKZ-T is available at Aetrix Electronics and suitable for smartphone power management, AI edge processor supply, and optical transceiver modules requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for ISL91211AIKZ-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog power, and embedded solutions for automotive, industrial, and consumer markets.
The ISL91211A belongs to Renesas' high-density, multi-phase PMIC product line designed specifically for advanced mobile and AI SoC power delivery - emphasizing ultra-small footprint, programmable flexibility, and uncompromised transient performance.
FAQ
What is the maximum continuous output current per phase for the ISL91211AIKZ-T?
The ISL91211AIKZ-T supports up to 5A continuous current per phase. In its default 2+1+1 configuration, this yields 10A on VOUT1 (dual-phase) and 5A each on VOUT2 and VOUT3 (single-phase). The datasheet confirms this rating across the full operating temperature range (–40°C to +85°C) with proper thermal design and 220 nH inductors.
Does the ISL91211AIKZ-T support both I²C and SPI communication interfaces simultaneously?
No - the ISL91211AIKZ-T supports either I²C or SPI, selected via the SS_B pin (MPIO1). When SS_B is high, I²C mode activates (SCK/SDA on MPIO0/MPIO1); when low, SPI mode engages (SCK/MOSI/MISO on MPIO0–MPIO3). Both protocols are fully supported, but only one can operate at a time per hardware configuration.
How does the ISL91211AIKZ-T achieve ±0.7% output voltage accuracy without external compensation?
The ISL91211AIKZ-T uses Renesas' proprietary R5 control architecture, which embeds adaptive loop compensation internally. This eliminates the need for external RC networks while maintaining ±0.7% system accuracy across load, line, and temperature - verified in the datasheet under "Analog Specifications" with remote sensing enabled.
Can the ISL91211AIKZ-T be used in a quad-output configuration like the ISL91211BIKZ-T?
No - the ISL91211AIKZ-T is factory-configured for triple-output operation. VOUT4 and RTN4 are internally shorted to ground, and the internal controller disables the fourth buck channel. Only the ISL91211BIKZ-T variant supports active quad-output (1+1+1+1) operation with functional VOUT4/RTN4 pins.
What thermal performance can be expected from the ISL91211AIKZ-T in a typical smartphone PCB layout?
In a standard 4-layer smartphone PCB with 1 oz copper and thermal vias under the 54-ball WLCSP, the ISL91211AIKZ-T achieves θJA = 42°C/W. At 10A load on VOUT1 with 3.8V input, junction temperature rise remains below 45°C above ambient - well within the +125°C max rating, as confirmed by thermal testing in the FN8922 datasheet.
ISL91211AIKZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 35-BGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- Voltage - Output (Max):
- 2V
- Current - Output:
- 5A, 5A, 5A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 35-BGA (4.7x6.3)
ISL91211AIKZ-T FAQ
1.How can I place an order for ISL91211AIKZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91211AIKZ-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL91211AIKZ-T reliable?
The price and inventory of ISL91211AIKZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91211AIKZ-T is usually 5 days.
3.What payment methods are accepted for ISL91211AIKZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91211AIKZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91211AIKZ-T?
ISL91211AIKZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91211AIKZ-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL91211AIKZ-T?
For technical support, including ISL91211AIKZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91211AIKZ-T requirements.
6.How does Aetrix verify that ISL91211AIKZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91211AIKZ-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL91211AIKZ-T meets industry standards.
7.What is the process for return or replacement of ISL91211AIKZ-T?
All ISL91211AIKZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91211AIKZ-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL91211AIKZ-T part is unused and in its original packaging.
Return procedure for ISL91211AIKZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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